Metabones T CINE Speed Booster XL 0.64x Adapter, Canon EF Lens to BMPCC4K Camera

The BMPCC4K Speed Booster ULTRA XL 0.64x is similar to the standard M43 Speed Booster adapter but the optics have been re-designed to optimize for the filter stack thickness of 2.4mm found in Blackmagic cameras rather than the 4mm of a standard Micro Four Thirds. In addition to optimized optical design, the CINE version is equipped with an extremely robust cine-style positive locking mechanism to ensure that no play occurs during focusing. This is especially important when using EF lenses for cine work because even though they provide a very smooth focus movement. Metabones Canon EF to BMPCC4K Speed Booster adapters are designed exclusively for Blackmagic Design Pocket Cinema Camera 4K (BMPCC4K). They cannot be attached to any other M43 cameras such as JVC, Olympus or Panasonic cameras. The BMPCC4K Speed Booster XL 0.64x reduces the crop factor of the BMPCC 4K camera from 2.02x to 1.29x and produces the largest aperture optics currently available, with a maximum output aperture of f/0.8.

Optical
Canon EF mount lens to Blackmagic Design cameras with M43 mount, specific for BMPCC4K
Increase maximum aperture by 1 1/3 stop. (with a maximum output aperture of f/0.80)
Increase MTF
Makes lens 0.64x wider
Patented 7-element/4-group optical design by Caldwell Photographic in the USA

Electrical
Lens iris/aperture is set by the controls on the camera body
Smooth iris support with the latest Canon (2009+), Tamron (SP series 2013+) and Sigma (2016+) lens models
Image stabilization (IS) lens support
Push autofocus if supported by camera
Powered by camera body. With most lenses, no external power source required

Mechanical
Patented positive-lock EF lens mount
Detachable tripod foot compatible with Arca-type ball head, such as Arca Swiss, Markins and Photo Clam or attach to quick release plate by a 1/4" 20 screw
The tripod foot is tailor-made to match the exact height as the BMPCC4K camera body
Flocking to reduce internal reflection
Rubber gasket protects M43 mount connection from dust and moisture
Aluminum alloy and brass construction with chromium plating
Satin surface finish